Hi,
I am trying to write C callable assembly functions for 5515 device. I would like to know which registers should be saved on stack by the called assembly function? I looked the code for hardware fft routines (see attached file), but some function in these files saved nothing to stack!! for example
;******************************************************************************
; Bit-reverses data vector
;******************************************************************************
_hwafft_br:
; XAR0 : input vector address
; XAR1 : output vector address
; T0 : data_len -- size of input/output vectors
bit(ST2, #15) = #0 ; clear ARMS
T1 = T0 - #1
BRC0 = T1
localrepeat {
AC3 = dbl(*AR0+)
dbl(*(AR1 + T0B)) = AC3
}
bit(ST2, #15) = #1 ; set ARMS
return
Thanking You,
Ras
